If you are aware that this problem exists at a location, the Base Station needs to be returned
to 3M for an exchange. This is not field-repairable. Please indicate why you are returning
it.
Attached to this bulletin are Installation Instructions for the new C921BA Base Station. It also contains a short
description of the new features.
C860 Lapel Microphone Assembly
A Lapel Mic and Earpiece (78-8095-0599-9) is now
available as an optional component for the
C860
Beltpack.
The price is the same as the original headset. C860
Systems and Upgrade Systems are only available with the
original headset (78-8095-0598-1). The Lapel Mic and
Earpiece is more comfortable when used for long periods.
A
C860
, when used with the original headset (78-8095-
0598-1), can be used in conjunction with C760 and C960
headsets. However, the Lapel Microphone, when mounted
on the lapel is too far away from the mouth to have the
same audio level as that on a headset. Consequently, the
outbound audio level will be lower by 6 to 9 dB. The lapel
mic was brought into the line for use by banks and
convenience stores; people who would normally find a
headset too obtrusive.
C860 Lapel Mic and Earpiece 78-8095-0599-9
Figure 2
C860 Redesigned Pouch
The pouch currently being shipped with the C860 Beltpack is now made of matte black leather, secured with
snaps. The part number (78-8095-0531-2) is the same as that of the previous pouch. The web belt remains the
same.
A200 and A201 Loop Detectors
Two new Loop Detectors will soon be released. Both have two sets of output contacts.
The Model A200 Loop Detector comes with a 12VDC plug-in power supply and is designed as a stand-alone
loop detector. Use this detector if a backup wired intercom is used to support the primary intercom.
The Model A201 Loop Detector comes with a special ribbon cable and is designed specifically as an optional
accessory for the 3M C921BA or later Base Station. Power and switch closure signals are supplied through a
ribbon cable.
C960 Updated Replacement Parts List
Attached to this bulletin are updated Replacement Parts and Service pages 3-5 and 3-6, to replace the ones dated
“September 1997” in the C960 Service Manual.
Summary of Contents for C860
Page 55: ...3 Figure 3 2 ...
Page 59: ...3 Figure 3 2 ...
